diff --git a/src/File.php b/src/File.php
index 7b7d5b1..b0c0650 100644
--- a/src/File.php
+++ b/src/File.php
@@ -4,36 +4,49 @@
 
 namespace Ambimax\File;
 
-use RuntimeException;
+use Symfony\Component\Filesystem\Path;
 
 class File implements FileInterface
 {
+    public const MODE_READ = 'r';
+    public const MODE_READ_PLUS = 'r+';
+    public const MODE_WRITE = 'w';
+    public const MODE_WRITE_PLUS = 'w+';
     /**
      * @var resource
      */
     protected $fileHandle;
 
     protected string $filePath;
+    protected string $mode;
 
+    /**
+     * @param self::MODE_* $mode
+     */
     public function __construct(string $filePath, string $mode)
     {
         $this->openStream($filePath, $mode);
-        $this->filePath = $filePath;
     }
 
     protected function openStream(string $filePath, string $mode): void
     {
-        if (!file_exists($filePath)) {
-            throw new RuntimeException("File '$filePath' does not exist.");
+        if (
+            !in_array($mode, [
+                self::MODE_WRITE,
+                self::MODE_WRITE_PLUS,
+            ]) && !file_exists($filePath)
+        ) {
+            throw new \RuntimeException("File '$filePath' does not exist.");
         }
 
         $tmpFileHandle = fopen($filePath, $mode);
         if (false === $tmpFileHandle) {
-            throw new RuntimeException("Could not open file '$filePath'.");
+            throw new \RuntimeException("Could not open file '$filePath'.");
         }
 
         $this->fileHandle = $tmpFileHandle;
         $this->filePath = $filePath;
+        $this->mode = $mode;
     }
 
     public function __destruct()
@@ -53,19 +66,94 @@ public function getBasename(): string
         return basename($this->filePath);
     }
 
+    /**
+     * @return resource
+     */
+    public function getFileHandle()
+    {
+        return $this->fileHandle;
+    }
+
     /**
      * @return false|string
      */
     public function getContent()
     {
-        return stream_get_contents($this->fileHandle);
+        $pointerLocation = ftell($this->fileHandle);
+        if (false === $pointerLocation) {
+            throw new \RuntimeException('unable to get current location of the file pointer. exception thrown to prevent unpredictable pointer jumping');
+        }
+        rewind($this->fileHandle);
+
+        $content = stream_get_contents($this->fileHandle);
+        fseek($this->fileHandle, $pointerLocation);
+
+        return $content;
     }
 
     /**
-     * @return resource
+     * Changes relative path to an absolut path relative to the current file location.
+     * This is to prevent confusion of e.g. rename() where the path would be relative to the php working directory.
+     * If the path is already absolute or has a protocol defined the path won't be affected by this.
+     *
+     * If the path ends with the directory separator ("/") the current file name will get appended
      */
-    public function getFileHandle()
+    protected function ensureAbsolutePath(string $path): string
     {
-        return $this->fileHandle;
+        if (
+            true === Path::isLocal($path) &&
+            false === Path::isAbsolute($path)
+        ) {
+            $path = Path::join(dirname($this->filePath), $path);
+        }
+
+        if (DIRECTORY_SEPARATOR === $path[-1]) {
+            $path = Path::join($path, $this->getBasename());
+        }
+
+        return $path;
+    }
+
+    public function rename(string $newPath): bool
+    {
+        $newPath = $this->ensureAbsolutePath($newPath);
+
+        fclose($this->fileHandle);
+
+        $success = rename($this->filePath, $newPath);
+        $this->openStream($newPath, $this->mode);
+
+        return $success;
+    }
+
+    public function move(string $newPath): bool
+    {
+        return $this->rename($newPath);
+    }
+
+    /**
+     * @param int<0, max>|null $length
+     */
+    public function fwrite(string $data, ?int $length = null): int|false
+    {
+        return fwrite($this->fileHandle, $data, $length);
+    }
+
+    /**
+     * @param int<0, max>|null $length
+     */
+    public function fread(?int $length = null): string|false
+    {
+        return fread($this->fileHandle, $length);
+    }
+
+    public function ftell(): int|false
+    {
+        return ftell($this->fileHandle);
+    }
+
+    public function fseek(int $offset, int $whence = SEEK_SET): int
+    {
+        return fseek($this->fileHandle, $offset, $whence);
     }
 }
diff --git a/src/FileInterface.php b/src/FileInterface.php
index 3d7e97a..924157b 100644
--- a/src/FileInterface.php
+++ b/src/FileInterface.php
@@ -6,11 +6,6 @@
 
 interface FileInterface
 {
-    /**
-     * @return false|string
-     */
-    public function getContent();
-
     public function getPath(): string;
 
     public function getBasename(): string;
@@ -19,4 +14,21 @@ public function getBasename(): string;
      * @return resource
      */
     public function getFileHandle();
+
+    /**
+     * @return false|string
+     */
+    public function getContent();
+
+    public function rename(string $newPath): bool;
+
+    public function move(string $newPath): bool;
+
+    public function fwrite(string $data, ?int $length = null): int|false;
+
+    public function fread(?int $length = null): string|false;
+
+    public function ftell(): int|false;
+
+    public function fseek(int $offset, int $whence = SEEK_SET): int;
 }
diff --git a/src/Remote/SftpFile.php b/src/Remote/SftpFile.php
index 784714e..0e28d36 100644
--- a/src/Remote/SftpFile.php
+++ b/src/Remote/SftpFile.php
@@ -5,20 +5,26 @@
 namespace Ambimax\File\Remote;
 
 use Ambimax\File\File;
+use phpseclib3\Net\SFTP;
 use phpseclib3\Net\SFTP\Stream;
-use RuntimeException;
 
 class SftpFile extends File
 {
     protected string $hostname;
     protected string $username;
     protected string $password;
+    protected SFTP $sftp;
 
+    /**
+     * @param File::MODE_* $mode
+     */
     public function __construct(string $hostname, string $username, string $password, string $filePath, string $mode)
     {
         $this->hostname = $hostname;
         $this->username = $username;
         $this->password = $password;
+        $this->sftp = new SFTP($hostname);
+        $this->sftp->login($username, $password);
         parent::__construct($filePath, $mode);
     }
 
@@ -34,9 +40,23 @@ protected function openStream(string $filePath, string $mode): void
             $mode);
 
         if (false === $tmpFileHandle) {
-            throw new RuntimeException(sprintf('Could not open file \'%s\'.', $filePath));
+            throw new \RuntimeException(sprintf('Could not open file \'%s\'.', $filePath));
         }
 
         $this->fileHandle = $tmpFileHandle;
+        $this->filePath = $filePath;
+        $this->mode = $mode;
+    }
+
+    public function rename(string $newPath): bool
+    {
+        $newPath = $this->ensureAbsolutePath($newPath);
+
+        fclose($this->fileHandle);
+
+        $success = $this->sftp->rename($this->filePath, $newPath);
+        $this->openStream($newPath, $this->mode);
+
+        return $success;
     }
 }
diff --git a/src/Test/FileTest.php b/src/Test/FileTest.php
index ba40d8e..e73ae7e 100644
--- a/src/Test/FileTest.php
+++ b/src/Test/FileTest.php
@@ -56,4 +56,36 @@ public function testGetFileHandle(): void
         $this->assertIsResource($this->readableFile->getFileHandle());
         $this->assertIsNotClosedResource($this->readableFile->getFileHandle());
     }
+
+    public function testRename(): void
+    {
+        $oldFileHandle = $this->readableFile->getFileHandle();
+
+        $this->readableFile->rename('newtest');
+        $this->assertSame($this->root->url().'/newtest', $this->readableFile->getPath());
+
+        $newFileHandle = $this->readableFile->getFileHandle();
+        $this->assertSame('testContent', stream_get_contents($newFileHandle));
+
+        $this->assertIsClosedResource($oldFileHandle);
+    }
+
+    public function testMoveToDifferentFolderAbsolutePath(): void
+    {
+        $oldFileHandle = $this->readableFile->getFileHandle();
+
+        mkdir($this->root->url().'/testFolder');
+        $this->readableFile->rename($this->root->url().'/testFolder/');
+        $this->assertSame($this->root->url().'/testFolder/test', $this->readableFile->getPath());
+        $this->assertFileExists($this->root->url().'/testFolder/test');
+
+        $this->readableFile->rename('../testFile');
+        $this->assertSame($this->root->url().'/testFile', $this->readableFile->getPath());
+        $this->assertFileExists($this->root->url().'/testFile');
+
+        $newFileHandle = $this->readableFile->getFileHandle();
+        $this->assertSame('testContent', stream_get_contents($newFileHandle));
+
+        $this->assertIsClosedResource($oldFileHandle);
+    }
 }